.input {
  display: block;
  background: rgba(196, 204, 215, 0.4);
  border-radius: 2vw;
  width: 100%;
  padding: 0 4vw;
  position: relative;
  z-index: 0;
  box-sizing: border-box;
  height: 12vw;
  line-height: 12vw;
  border: 0;
  font-size: 4vw;
  color: #333;
  outline: 0;
}
.input:focus {
  background-color: rgba(196, 204, 215, 0.6);
}